Exit UEFI boot services and halt.
* Add editorconfig. * Add emacs backup files to gitignore. * Use x86_64 package instead of raw asm. * Set rust toolchain to default to nightly. * Add support for release builds to run.sh. * Mention minimum system requirements to README.master
parent
6c806fc9ae
commit
0ef35c4653
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@ -0,0 +1,8 @@
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root = true
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[*]
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charset = utf-8
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indent_style = space
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indent_size = 4
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trim_trailing_whitespace = true
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insert_final_newline = true
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@ -1,2 +1,3 @@
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/target
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/drive
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*~
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@ -1,5 +1,11 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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[[package]]
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name = "bit_field"
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version = "0.9.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ed8765909f9009617974ab6b7d332625b320b33c326b1e9321382ef1999b5d56"
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[[package]]
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name = "bit_field"
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version = "0.10.0"
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@ -18,6 +24,7 @@ version = "0.1.0"
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dependencies = [
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"compiler_builtins",
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"uefi",
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"x86_64",
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]
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[[package]]
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@ -75,7 +82,7 @@ version = "0.3.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "85061f4e43545a613c0da6b87725bf23f8da8613cf2473719c4f71a270c4ce8a"
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dependencies = [
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"bit_field",
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"bit_field 0.10.0",
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]
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[[package]]
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@ -106,3 +113,13 @@ name = "unicode-xid"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
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[[package]]
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name = "x86_64"
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version = "0.11.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9144cdef072afe8afcbc511be8f421de5b3eb9f4b8ff7abff369bee38f91e7e3"
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dependencies = [
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"bit_field 0.9.0",
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"bitflags",
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]
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@ -7,3 +7,4 @@ edition = "2018"
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[dependencies]
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compiler_builtins = { git = "https://github.com/rust-lang/compiler-builtins" }
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uefi = "0.4.6"
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x86_64 = "0.11.1"
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@ -8,6 +8,11 @@ rather than through a traditional operating system.
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I don't seriously expect to ever accomplish that, so for now I'm probably just going to...
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make a forth or something.
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## System Requirements
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Other configurations may work, but only these systems are regularly tested.
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* CPU: x86_64 QEMU, OVMF UEFI.
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* Memory: 128 MB. (64 MB appears to be the minimum required to load OVMF at all. Real hardware might require less?)
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## Running
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bootproof runs on x86_64 UEFI. You may either boot the program directly on your own computer or use an emulator.
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@ -15,7 +20,7 @@ Make sure you have the `cargo-xbuild` crate installed and nightly Rust so you ca
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First, build with:
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```
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cargo +nightly xbuild --target x86_64-unknown-uefi
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cargo xbuild --release --target x86_64-unknown-uefi
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```
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And to run, simply `./run.sh`.
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And to run, `./run.sh` will launch bootproof in QEMU.
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3
run.sh
3
run.sh
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#!/bin/bash
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profile=${1:-"debug"}
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mkdir -p drive/EFI/Boot
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cp target/x86_64-unknown-uefi/debug/bootproof.efi drive/EFI/Boot/BootX64.efi
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cp "target/x86_64-unknown-uefi/$profile/bootproof.efi" drive/EFI/Boot/BootX64.efi
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qemu-system-x86_64 -nodefaults -machine "q35,accel=kvm:tcg" -smp 8 -m 128M -drive "if=pflash,format=raw,file=/usr/share/OVMF/OVMF_CODE.fd,readonly=on" -drive "if=pflash,format=raw,file=/usr/share/OVMF/OVMF_VARS.fd,readonly=on" -drive "format=raw,file=fat:rw:drive" -serial stdio -display none
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@ -0,0 +1 @@
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nightly
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81
src/main.rs
81
src/main.rs
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#![no_std]
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#![no_main]
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#![feature(abi_efiapi)]
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#![feature(asm)]
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use core::fmt::Write;
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use core::panic::PanicInfo;
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use core::mem;
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use core::slice;
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use core::writeln;
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use uefi::prelude::*;
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use uefi::table::boot::{AllocateType, MemoryDescriptor, MemoryType};
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use x86_64::instructions;
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enum LoggerStdio {
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// It is impossible to get ownership of an Output,
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// so instead we must pass in the entire boot system table.
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Boot(SystemTable<Boot>),
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None
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}
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fn halt() -> ! {
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instructions::interrupts::disable();
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loop { instructions::hlt(); }
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}
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// Required for use by the panic handler.
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// This should not be used anywhere else.
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static mut global_st: Option<*mut SystemTable<Boot>> = None;
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static mut LOGGER_STDIO: LoggerStdio = LoggerStdio::None;
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#[panic_handler]
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fn panic(info: &PanicInfo) -> ! {
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let st = unsafe { &global_st.unwrap().read() };
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writeln!(st.stderr(), "stderr: {}", info);
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writeln!(st.stdout(), "stdout: {}", info);
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match unsafe { &LOGGER_STDIO } {
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LoggerStdio::Boot(st) => {
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writeln!(st.stderr(), "{}", info).unwrap();
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},
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LoggerStdio::None => {
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// There's pretty much nothing we can do in this case.
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// What are we supposed to do-- panic?
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}
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}
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loop {}
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halt();
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}
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fn setup(st: &SystemTable<Boot>, _handle: Handle) {
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let stdout = st.stdout();
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stdout.reset(false).expect_success("Failed to reset UEFI stdout.");
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writeln!(stdout, "Booting...").unwrap();
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writeln!(stdout, "Exiting the UEFI boot services.").unwrap();
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}
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fn main(st: SystemTable<uefi::table::Runtime>, mmap: uefi::table::boot::MemoryMapIter) -> ! {
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halt();
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}
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#[entry]
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fn efi_main(handle: Handle, st: SystemTable<Boot>) -> Status {
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let mut g_st = unsafe { st.unsafe_clone() };
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fn efi_main(handle: Handle, st_boot: SystemTable<Boot>) -> Status {
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// Tasks that require the UEFI boot services.
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unsafe {
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global_st = Some(&mut g_st);
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LOGGER_STDIO = LoggerStdio::Boot(st_boot.unsafe_clone());
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}
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st.stdout().reset(false).expect_success("Failed to reset UEFI stdout.");
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writeln!(st.stdout(), "Hello, world!");
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setup(&st_boot, handle);
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loop {}
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// Exit the UEFI boot services.
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Status::SUCCESS
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// The memory map buffer must live at least as long as the memory map iterator.
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let mmap_buf;
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let (st_runtime, mmap) = {
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let bs = st_boot.boot_services();
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// More allocations can happen between the allocation of the buffer and the buffer being filled,
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// so arbitrarily add space for 8 more memory descriptors just to make sure there's enough.
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let mmap_buf_size = bs.memory_map_size() + 8 * mem::size_of::<MemoryDescriptor>();
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mmap_buf = bs.allocate_pages(AllocateType::AnyPages, MemoryType::LOADER_DATA, mmap_buf_size)
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.expect_success("Could not allocate space for UEFI memory map.");
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let mmap_buf_slice = unsafe { slice::from_raw_parts_mut(mmap_buf as *mut u8, mmap_buf_size) };
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st_boot.exit_boot_services(handle, mmap_buf_slice).expect_success("Failed to exit the UEFI boot services.")
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};
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// Tasks that do not require the UEFI boot services.
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// I do not currently have an adequate stdout for post-UEFI, but the UEFI one is now invalid.
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unsafe {
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LOGGER_STDIO = LoggerStdio::None;
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}
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main(st_runtime, mmap);
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}
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